Phase I/II trial to study the effectiveness of combining radiolabeled monoclonal antibody therapy and rituximab with and without filgrastim and interleukin-11 in treating patients who have relapsed or refractory non-Hodgkin's lymphoma. Radiolabeled monoclonal antibodies can locate cancer cells and deliver cancer-killing substances to them without harming normal cells. Biological therapies such as filgrastim and interleukin-11 use different ways to stimulate the immune system and stop cancer cells from growing.